I was diagnosed with PCOS back in 2008 and put on Metformin. I started on 500mg twice a day, and was then upped to 1000 mg twice a day. I was able to lose 90 pounds over the course of 2 years. (combined with exercise, and eating the proper amount of calories.) I got pregnant (surprise!) last year and just started back on the Metformin last month.
I think for me it's safer to say that it's not that the Met helps me lose weight, as much as it helps to prevent me from gaining weight. Before the met, I was either actively trying to lose, or I was gaining, there was no such thing as maintaining in my world. Once I started taking the Met, If I was actively trying to lose weight I would. If I wasn't I would at least maintain.
It also helped me with bingeing. Pre-Met I would eat a lot of junk food, which would make my sugar and insulin do wacky things, which would ultimately make my blood sugar drop which would make my body tell me I was starving. It was a very vicious cycle.
If you want to lose weight I recommend exercise and staying within a calorie range along with the Metformin. I also recommend the Insulin Resistance diet as a rough guideline. (Basically, always pair your carbs with protein, and try to limit yourself to 30g of carbs within a 2 hour timeline). Eat small frequent meals rather than big ones, and lean more towards complex carbs (instead of simple).
| current weight: 264.0